"Twitter is a service for friends, family, and coworkers to communicate and stay connected through the exchange of quick, frequent messages. People post Tweets, which may contain photos, videos, links and up to 140 characters of text. These messages are posted to your profile, sent to your followers, and are searchable on Twitter search."
Twitter Help Center. (2016). New user FAQs. Retrieved June 4, 2016 from https://support.twitter.com/articles/13920#